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I may not be understanding you but the problem is when calculating volume it differs by 5m3 if using the eaves as a reference point since the eaves are wider than the wall (I'm not arguing the height other than at the apex of the roof). This matters to me because it means I will not be able...

Its for a dormer - there have been previous additions to roof space it is vital I keep within the 50m3 allowed under PD as I would not get PP for this. There is no indication either under GPDO or the Planning Portal for using eaves as a point of measurement. Indeed, both seem to indicate...

Hi, my planners tell me I should measure from the eaves to calculate roof volume but I dispute this since there is nothing in the Planning Portal or GPDO to suggest this and it seems to use the walls as the fixed point of measurement. I'd prefer the latter since it gives me an extra 5m3. Can...

Wish I could do the drawings - anyway no its not like that! Looking at your last diagram - if you remove the blue part, imagine drawing a line back along the ridge of the roof 3m, drawing a line from this point to where the edge of the floor and front wall would meet this makes the pyramid...

Hello again, thanks for your patience! Sorry, this is all new to me! The calculation I gave was for the gable end addition created by the previous owners. So, originally the roof was standard pitched and they altered it to make a gable end - which were the calculations I gave of 6 x 3...

Thanks so much for your help. Can I pick your brains one last time? Re the calculation, you would think it would be the same whichever method used but its not so clearly I am doing something wrong. Perhaps you can help me again? The roof space I am calculating has a dimension of 6m wide...

As far as I can establish PD is very clear about the allowance of 50 cubic metres. I am within this if I work out the roof space volume by using the mathematical formula for calculating the area of a pyramid. If planners use this calculation for working out the additional volume for adding a...

Thanks for this info. The planning dept are really unhelpful, I have been to visit them on three occasions but they manage to obfuscate every time! If it is the case that the additional roof space created above the garage wont count in the 50 cubic metres allowed by PD then I have no problem...

Hi, I am planning a loft conversion - dormer - and have had plans drawn up which, depending on where I calculate measurements, either give me 49 cubic metres or 53. The discrepancy arises because the house has had roof extensions by previous owners, who turned a sloping roof where two...